<svg xmlns="http://www.w3.org/2000/svg">
  <style>
    rect { stroke: blue; stroke-width: 15px; }
  </style>
  
  <rect x="70px" y="20px" width="145px" height="145px"
        style="stroke: none; stroke-dasharray: 20px, 5px">
  </rect>
  <rect x="270px" y="20px" width="145px" height="145px"
        style="stroke: none; stroke-dasharray: 20px, 5px">
  </rect>
  
  <line x1="60px" y1="280px" x2="440px" y2="280px"
        style="stroke: blue; stroke-width: 200px; stroke-dasharray: 165px, 40px">
  </line>
</svg>
